SrAl_2O_4:Eu^(2+),Dy^(3+)的上转换发光特性  

Up-conversion Luminescent Properties of SrAl_2O_4:Eu^(2+),Dy^(3+) Phosphors

作　　者：马云麒[1] 衣光舜[1] 孙宝全[1] 陈德朴[1] 

机构地区：[1]清华大学化学系,北京100084

出　　处：《光谱学与光谱分析》2003年第3期435-437,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金资助项目 (399890 0 1;3982 51 0 8)

摘　　要：铕镝共掺的铝酸锶是一种新型的绿色长余辉荧光材料 ,经可见 -紫外光激发后 ,能发出超长时间的余辉。本文首次用 980nm的红外激发光源激发SrAl2 O4 :Eu2 + ,Dy3+ 磷光体后 ,在室温下观测到了SrAl2 O4 :Eu2 + ,Dy3+ 的绿色上转换荧光。并测得了其上转换荧光光谱图。与其正常的荧光光谱图相比 ,两者的峰形及波峰的位置有很大的差异 ,这预示着两者有不同的发光机理 ,并就其发光机理进行了初步的探讨。所用的样品经高温固相法合成后 ,用XRD表征。两种荧光光谱用荧光光谱仪测定。Strong green up-conversion emission was observed for the first time in europium and dysprosium co-doped strontium aluminate (SrAl2 O-4 : Eu2+, Dy3+) phosphor under 980 nm infrared excitation at room temperature. The up-conversion emission spectrum of phosphors was quite different from that of down-conversion emission spectrum excited by ultraviolet or visible lights. The two kinds of emission spectra implied that there are different mechanisms of emission. The X-ray diffraction (XRD) results revealed that the prepared phosphor has the same crystal lattice and composition as that reported previously.

关 键 词：铝酸锶 荧光材料 上转换发光特性 SRAL2O4:EU^2+ DY^3+ 上转换发射 荧光光谱 

分 类 号：TN104.3[电子电信—物理电子学]